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Discussion Starter #1
Hi all,

So I’ve only just discovered that you can get an additive to put in with the oil to stop minor oil leaks!!!

I’ve had a slow oil leak forever with the car; only a small drip on the driveway but it is enough to be irritating.
Used to be the sump plug but that’s dry now.

So my question is has anybody used one and has anyone any recommendations to avoid or use?

There STP, Redex, Wynn’s and others.

I have a 2001 147 2.0L Twin Spark Petrol Manual.

Any help muchly appreciated thanks!
 

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Not a great idea as they can block up minor oil passages, then it will have to be drained and cleaned out.

Your twinny relies on oil pressure to actuate variable valve timing etc.

Always sceptical of anything like K Seal, rad weld etc as it just masks the symptoms - you'd be safer locating the leak and fixing it, or short term, park over some cardboard or something where you won't leave a nice oily stain!
 

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A small oil blotch on the pavement is better than a blown motor. Stop leak is only ok when you know the car is going to be scrapped soon, including the motor.

If the leak irritates you 400 pounds worth, then have the motor taken out, refresh the seals and put back.

If the leak irritates you 10 pounds a month worth, get a decent belly pan and have it washed once a month.
 

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An oil stop leak is never going to be as good as fixing the fault. That said, I think there is confusion about how it works. It's not a product like K-Seal for cooling systems or something to reduce piston ring blow-by.

An oil stop leak is simply a concentrated ester based additive which softens and swells seals slightly. It does the opposite of Poly Alfa Olefin based oil.

That said, engine seals can be made of specific materials tailored to each application and additive will not affect all seals equally so it is hardly a targeted treatment. It should be safe enough to use and interestingly very similar to engine oil marketed for high mileage engines. The principles are the same.
 

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Discussion Starter #6
Hello all,

Thanks for all of the advice much appreciated!
Especially:

Your twinny relies on oil pressure to actuate variable valve timing etc.
That I hadn't realised/ appreciated.

I've not added any additive, just carried on using oil.

Petronas Syntium 800 EU (used to use 1000)

Anyway I think I traced the leak...

So a while back when I had my CAM Belt and Timing Belt etc changed; the chap said I needed a new seal.

The thing is; it looks like the small leak is coming from the top of the engine; looking at the top panel at the lower right hand corner it seems a trickle is coming from there.....

:scratchchin:
 

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Hello all,

Thanks for all of the advice much appreciated!
Especially:



That I hadn't realised/ appreciated.

I've not added any additive, just carried on using oil.

Petronas Syntium 800 EU (used to use 1000)

Anyway I think I traced the leak...

So a while back when I had my CAM Belt and Timing Belt etc changed; the chap said I needed a new seal.

The thing is; it looks like the small leak is coming from the top of the engine; looking at the top panel at the lower right hand corner it seems a trickle is coming from there.....

:scratchchin:
Rocker cover gasket. Cost you about 15 quid for a new one and you can do it yourself in under an hour.

ETA: Good step by step guide here:

https://www.alfaowner.com/Forum/alfa-gtv-andamp-916-spider/157654-alfa-gtv-2ltr-twinspark-how-change-your-cam-cover-gasket.html#post2415602
 

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Yep, nice easy job, apart from the 1 bolt round the back of the head, which isn't obvious, once you know it's there, it's a quick job.
 

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I would add that where the gasket goes over the large and long camshaft cap on the left there are corners where it changes direction to do so, use a dab or RTV sealant there otherwise it may leak.
 
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